Ways to buy 7
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 Anthropic APIThe lab's own API · cached $0.3 | $3 | $15 | $3 / $15List price | $0.3 | List price |
 AWS BedrockDefault region · cached $0.3 | $3 | $15 | $3 / $15Same as list | $0.3 | Same as list |
 Azure AI Foundryglobal · cached $0.3 | $3 | $15 | $3 / $15Same as list | $0.3 | Same as list |
| Claude Platform on AWS Default region · cached $0.3 | $3 | $15 | $3 / $15Same as list | $0.3 | Same as list |
 Google Vertex AIglobal · cached $0.3 | $3 | $15 | $3 / $15Same as list | $0.3 | Same as list |
| AWS Bedrock eu-west-1 · cached $0.33 | $3.3 | $16.5 | $3.3 / $16.5+10% vs list | $0.33 | +10% vs list |
| Google Vertex AI us-east5 · cached $0.33 | $3.3 | $16.5 | $3.3 / $16.5+10% vs list | $0.33 | +10% vs list |
USD per 1M tokens; batch $1.5 in, $7.5 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $600.00 direct.
Helicone$600.00+0%
Kong AI Gateway$600.00+0%
LiteLLM$600.00+0%
Vercel AI Gateway$600.00+0%
Cloudflare AI Gateway$630.00+5%
Requesty$630.00+5%
Eden AI$633.00+5.5%
OpenRouter$633.00+5.5%
No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | ||||||
|---|---|---|---|---|---|---|---|
| Claude Opus 5.5 Anthropic · 1M | $4 | $20 | $4 / $20 | $8 | 1M | Lab list price | · |
| Claude Fable 5.1 Anthropic · 1M | $10 | $50 | $10 / $50 | $20 | 1M | Lab list price | · |
| Claude Opus 5 Anthropic · 1M | $5 | $25 | $5 / $25 | $10 | 1M | Lab list price | · |
| Claude Sonnet 5 Anthropic · 1M | $2 | $10 | $2 / $10 | $4 | 1M | Lab list price | · |
 GPT-5.6 SolOpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
| GPT-5.5 OpenAI · 1.05MCheapest: $5.63 on OpenAI (flex) | $5 | $30 | $5 / $30 | $11.3 | 1.05M | $5.63 on OpenAI (flex) | · |
 Gemini 3.1 Pro PreviewGoogle · 1MCheapest: $2.25 on Google Vertex AI (global-flex) | $2 | $12 | $2 / $12 | $4.5 | 1M | $2.25 on Google Vertex AI (global-flex) | · |
 Qwen3.8 Max (0902)Qwen (Alibaba) · 1M | $2 | $6 | $2 / $6 | $3 | 1M | Lab list price | · |
About Claude Sonnet 4.5
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows.
Takes text, image, files in and returns text. First listed Oct 1, 2025. Up to 64K output tokens. Blended price $6 per 1M tokens at 3 input to 1 output. Overall score 6 on leadersboard.fru.dev (rank 25). Model id claude-sonnet-4-5.
Price history
List price since Oct 1, 2025, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does Claude Sonnet 4.5 cost?
$3 per million input tokens and $15 per million output tokens, with cached input at $0.3, or $1.5 and $7.5 through the Batch API.
What is the context window of Claude Sonnet 4.5?
1M tokens, with up to 64K tokens of output.
Where is Claude Sonnet 4.5 cheapest?
Of 7 routes tracked, AWS Bedrock is cheapest at $3 input and $15 output per million tokens.
Sources: OpenRouter's public model catalog and each provider's own pricing page, read every morning at 05:00 UTC; gateway fees re-read every Monday. List prices: your contract may differ. Logos via logo.dev; trademarks belong to their owners.